Q9HIY0 (SPEH_THEAC) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
S-adenosylmethionine decarboxylase proenzyme
Short name=AdoMetDC
Short name=SAMDC
EC=4.1.1.50

Cleaved into the following 2 chains:

1. S-adenosylmethionine decarboxylase beta chain
2. S-adenosylmethionine decarboxylase alpha chain

Gene names

Name:	speH
Ordered Locus Names:	Ta1196

Organism

Thermoplasma acidophilum (strain ATCC 25905 / DSM 1728 / JCM 9062 / NBRC 15155 / AMRC-C165)

Taxonomic identifier

273075 [NCBI]

Taxonomic lineage

Archaea › Euryarchaeota › Thermoplasmata › Thermoplasmatales › Thermoplasmataceae › Thermoplasma

Protein attributes

Sequence length	131 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Inferred from homology

General annotation (Comments)

Function	Catalyzes the decarboxylation of S-adenosylmethionine to S-adenosylmethioninamine (dcAdoMet), the propylamine donor required for the synthesis of the polyamines spermine and spermidine from the diamine putrescine By similarity. HAMAP MF_00464
Catalytic activity	S-adenosyl-L-methionine = (5-deoxy-5-adenosyl)(3-aminopropyl)-methylsulfonium salt + CO2. HAMAP MF_00464
Cofactor	Pyruvoyl group By similarity. HAMAP MF_00464
Pathway	Amine and polyamine biosynthesis; S-adenosylmethioninamine biosynthesis; S-adenosylmethioninamine from S-adenosyl-L-methionine: step 1/1. HAMAP MF_00464
Subunit structure	Heterotetramer of two alpha and two beta chains arranged as a dimer of alpha/beta heterodimers By similarity.
Post-translational modification	Is synthesized initially as an inactive proenzyme. Formation of the active enzyme involves a self-maturation process in which the active site pyruvoyl group is generated from an internal serine residue via an autocatalytic post-translational modification. Two non-identical subunits are generated from the proenzyme in this reaction, and the pyruvate is formed at the N-terminus of the alpha chain, which is derived from the carboxyl end of the proenzyme. The post-translation cleavage follows an unusual pathway, termed non-hydrolytic serinolysis, in which the side chain hydroxyl group of the serine supplies its oxygen atom to form the C-terminus of the beta chain, while the remainder of the serine residue undergoes an oxidative deamination to produce ammonia and the pyruvoyl group blocking the N-terminus of the alpha chain By similarity. HAMAP MF_00464
Sequence similarities	Belongs to the prokaryotic AdoMetDC family. Type 1 subfamily.

Ontologies

Keywords
Biological process	Polyamine biosynthesis Spermidine biosynthesis
Ligand	Pyruvate S-adenosyl-L-methionine Schiff base
Molecular function	Decarboxylase Lyase
PTM	Autocatalytic cleavage Zymogen
Technical term	Complete proteome Reference proteome
Gene Ontology (GO)
Biological process	spermidine biosynthetic process Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	adenosylmethionine decarboxylase activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 63	63	S-adenosylmethionine decarboxylase beta chain By similarity		PRO_0000030157
	Chain	64 – 131	68	S-adenosylmethionine decarboxylase alpha chain By similarity		PRO_0000030158
Sites
	Active site	64	1	Schiff-base intermediate with substrate; via pyruvic acid By similarity
	Active site	69	1	Proton acceptor; for processing activity By similarity
	Active site	84	1	Proton donor; for catalytic activity By similarity
	Site	63 – 64	2	Cleavage (non-hydrolytic); by autolysis By similarity
Amino acid modifications
	Modified residue	64	1	Pyruvic acid (Ser); by autocatalysis By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q9HIY0 [UniParc]. Last modified March 1, 2001. Version 1. Checksum: A0FCA77B2E6EF8C4	FASTA	131	14,574
	10 20 30 40 50 60 MEVGVGIHII ADFYGVDSEL IATTERMYPI IEGAVEYGRL TKISSDYYQF RPKGASGIVL 70 80 90 100 110 120 LAESHLSFHT WPEYGLVTLD IYTCGDPKTA DDAFAYLVDK LRPTSISTRK IVRGDMIEEA 130 GENQIEEAAL H

References

[1]

"The genome sequence of the thermoacidophilic scavenger Thermoplasma acidophilum." Ruepp A., Graml W., Santos-Martinez M.-L., Koretke K.K., Volker C., Mewes H.-W., Frishman D., Stocker S., Lupas A.N., Baumeister W. Nature 407:508-513(2000) [PubMed: 11029001] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 25905 / DSM 1728 / JCM 9062 / NBRC 15155 / AMRC-C165.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AL445066 Genomic DNA. Translation: CAC12321.1.
RefSeq	NP_394652.1. NC_002578.1.
3D structure databases
ProteinModelPortal	Q9HIY0.
SMR	Q9HIY0. Positions 4-122.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	1456692.
GenomeReviews	Gene locus Ta1196 in contig AL139299_GR.
KEGG	tac:Ta1196.
NMPDR	fig|273075.1.peg.1174.
Phylogenomic databases
HOGENOM	HBG485559.
OMA	SYFFKFS.
ProtClustDB	PRK01236.
Enzyme and pathway databases
BioCyc	TACI273075:TA1196-MONOMER.
Family and domain databases
HAMAP	MF_00464. AdoMetDC_1. [Tree]
InterPro	IPR003826. S-AdoMet_decarboxylase-bac/arc. IPR016067. S-AdoMet_deCO2ase_core. IPR017716. S-AdoMet_deCOase_pro-enz. [Graphical view]
Gene3D	G3DSA:3.60.90.10. SAM_decarbox. 1 hit.
KO	K01611.
Pfam	PF02675. AdoMet_dc. 1 hit. [Graphical view]
SUPFAM	SSF56276. S-AdenosylMet_decarbase_core. 1 hit.
TIGRFAMs	TIGR03330. SAM_DCase_Bsu. 1 hit.
ProtoNet	Search...

Entry information

Entry name

SPEH_THEAC

Accession

Primary (citable) accession number: Q9HIY0

Entry history

Integrated into UniProtKB/Swiss-Prot:	October 24, 2001
Last sequence update:	March 1, 2001
Last modified:	November 16, 2011
This is version 62 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program